Created by: xiangyubo

add_sublayer这个函数是干嘛的呢？文档没有写的很清湖，不是很理解。我看 resnet 里在 init 的时候就用了，但是在 forward 的时候就没用，看着似乎没什么影响. 在 __init__里面有一段

self.bottleneck_block_list = []
num_channels = 64
for block in range(len(depth)):
    shortcut = False
    for i in range(depth[block]):
        bottleneck_block = self.add_sublayer(
            'bb_%d_%d' % (block, i),
            BottleneckBlock(
                self.full_name(),
                num_channels=num_channels,
                num_filters=num_filters[block],
                stride=2 if i == 0 and block != 0 else 1,
                shortcut=shortcut))
        num_channels = bottleneck_block._num_channels_out
        self.bottleneck_block_list.append(bottleneck_block)
        shortcut = True

但是在 forward 的时候

def forward(self, inputs):
    y = self.conv(inputs)
    y = self.pool2d_max(y)
    for bottleneck_block in self.bottleneck_block_list:
        y = bottleneck_block(y)
    y = self.pool2d_avg(y)
    y = self.out(y)
    return y